Buying Guide

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AHEAD OF THE FLOW
®
Valve Size
Throttling Factors
For throttling use with disc partially open. Multiply Cv by factor.
NOTE: gate valves are not throttled.
Size (mm.) 4 8 10 15 20 25 32 40 50 65 80 90 100 125 150 200 250 300 350 400 450 500 600 750 900
Size (In.) 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 3 1/2 4 5 6 8 10 12 14 16 18 20 24 30 36 0 10 20 30 40 50 60 70 80 90 100
GATES
S/T-29 0.5 2 4.9 9.1 22 40 65 95 175
S/T-111, 113, 131, 133
134, 136, 154,
174, 176
— 5.6 10.7 17.6 32 54 97 135 230 337 536 710 960 1,525 2,250
T/F-617, 619, 667,
669, 607, 609
F-637, 639
215 335 510 710 945 1,525 2,250 4,150
6,700 9,925 13,800 18,375 23,600 29,600 43,570
GLOBES
S/T-211, 235, 256
275-Y
0.61 1.16 2.2 3.64 6.65 11.1 20 28 48 70 111 — 198 0 0.35 0.65 0.90 0.93 0.96 0.98 0.99 1.00 1.00 1.00
T-275-B — 1.16 2.21 3.64 6.65 11.1 20 28 48 70 111 0 0.030 0.035 0.06 0.10 0.16 0.24 0.32 0.47 0.68 1.00
F-718, F-738, F-768 45 70 105 — 195 315 465 860 1,390 0 0.35 0.65 0.90 0.93 0.96 0.98 0.99 1.00 1.00 1.00
CHECKS
S/T-413, 433, 473 (Swing) — 1.3 2.5 4.8 14.3 24 43 60 102 150 238 315 435 675 1,000
S/T-480 (Poppet) — — 3.7 6.86 16.3 30 49 72 130
F-908 (Swing) 243 356 — 665 1,073 1,584 2,937
4,730 6,985
T/F-918, 968, 938 (Swing) 137 221 327 — 605 975 1,440 2,670 4,300 6,350
F-910, 960 (Poppet) 110 155 — 278 431 625 1,115 1,770 2,500 3400 4400 5600 6900 10000 15400 22400
W-910, 960 (Poppet) 66 88 130 — 228 350 520 900 1,450
G-920-W, KG-900-W 77 129 209 — 358 573 898 1,740 3,180 4,950
W-920-W, KW-900-W 76 161 224 — 400 648 1060 1,890 3,340 5,270 5,700 7,200 9,400 12,000 18,500 33,000 50,000
BALL 0° 10° 20° 30° 40° 45° 50° 60° 70° 80° 90°
F-510, 530 — — — 11 25 45 — 137 217 — 482 — 790 — 1,144 2,164 3,507 5,516 0 0.01 0.05 0.16 0.3 0.37 0.45 0.58 0.71 0.87 1
F-515, 535 — — — 25 50 85 — 259 440 840 1,400 — 2,350 — 5,200 10,200 14,400 25,300 0 0.01 0.05 0.16 0.3 0.37 0.45 0.58 0.71 0.87 1
T-560-BR/CS/S6 — 4 4 5 12 22 35 52 95 — — 0 0.01 0.05 0.16 0.3 0.37 0.45 0.58 0.71 0.87 1
T-570 — — — 7 12 25 38 52 95 — — 0 0.01 0.05 0.16 0.3 0.37 0.45 0.58 0.71 0.87 1
T/S-580 — — — 5.8 13.9 27 44 64 100 — — 0 0.01 0.05 0.16 0.3 0.37 0.45 0.58 0.71 0.87 1
T/S-580-70 — — — — — — 38.5 76 101.4 183 390 0 0.01 0.05 0.16 0.3 0.37 0.45 0.58 0.71 0.87 1
T/S-585-70 — 4.2 6.2 15.3 30.4 48.8 103 143 245 — — 0 0.01 0.05 0.16 0.3 0.37 0.45 0.58 0.71 0.87 1
TM-585-70-66 — — — 15.3 30.4 48.8 103 143 245 — — 0 0.01 0.05 0.16 0.3 0.37 0.45 0.58 0.71 0.87 1
AT-585-70-66 — — — — — — — — — 183 — 0 0.01 0.05 0.16 0.3 0.37 0.45 0.58 0.71 0.87 1
T-580-70-W3 — — — — — — 21.6 38 48.5 — — 0 0.01 0.05 0.16 0.3 0.37 0.45 0.58 0.71 0.87 1
T/S-585-70-W3 — — — 6 12 19.5 — — — — — 0 0.01 0.05 0.16 0.3 0.37 0.45 0.58 0.71 0.87 1
T-580 (CS-S6) — 6 12 15 23 36 44 64 114 — — 0 0.01 0.05 0.16 0.3 0.37 0.45 0.58 0.71 0.87 1
T/S-590-Y — — — — — — 44 64 100 183 390 0 0.01 0.05 0.16 0.3 0.37 0.45 0.58 0.71 0.87 1
T/S-595-Y — 5.9 11.4 18.7 34 57 103 143 245 310 — 0 0.01 0.05 0.16 0.3 0.37 0.45 0.58 0.71 0.87 1
TM/KM-595 (CS-S6) — 6 12 19 37 64 103 143 245 — — 0 0.01 0.05 0.16 0.3 0.37 0.45 0.58 0.71 0.87 1
T/K-595 (CS-S6) — 6 12 19 37 64 103 143 245 — — 0 0.01 0.05 0.16 0.3 0.37 0.45 0.58 0.71 0.87 1
BUTTERFLY
LD/WD-1000, 2000, 3000 166 247 340 — 660 1,080 1,613 3,759 5,300 7,969 11,917 16,383 21,705 27,908 43,116 63,328 86,375 0 0.03 0.06 0.12 0.18 0.22 0.27 0.4 0.56 0.8 1
GD-4765, 4775 FC-2700, FD-5700 145 195 290 — 600 930 1,600 3,450 5,800 8,950 0 0.03 0.06 0.12 0.18 0.22 0.27 0.4 0.56 0.8 1
NOTE: Flow data for angle valves use globe Cv times 1.25:
Bronze angles — 311, 335, 375, 376-AP
Iron angles — 818, 869, 831
WARNING
The fluid flow factors contained herein are calculated values.
They are, therefore, approximations and cannot be used for
highly critical flow or pressure drop calculations. For very
precise flow measurements, tests must be conducted on any
valve mentioned within this catalog. Throttling of ball valves is
not recommended when valves are less than 45° open.
Revised 10/1/2021